Well the Colorado River is about it...it is a desert

You can camp on BLM land for next to nothing (and no services whatsoever), but for more civilized camping I recommend Portal RV Park. They have individual and group tenting spots, restrooms, and best of all about 5 clean showers (cleaner than most campgrounds for sure). That will run you $8-10.50/day. There is also a lovely pond for my dog to cool off in.

Over the next few months we will need to figure out if a group site is in order, otherwise if two people share an individual site (plenty of room for multiple tents) it works out to $10.50 each per day. It is $8 per additional person after the first two.

This is my campsite last year, at a group site with the Reno VX crowd (they are out of the frame to the right)